Reviewer findings (1 blocking + 2 important):
- 🔴 Replace `import asyncio` / `await asyncio.sleep(0)` with
`import anyio` / `await anyio.sleep(0)` in the four async side-effect
helpers (_scroll_raises, _upsert_raises, _get_collection_raises,
_create_index). CLAUDE.md mandates anyio for all async operations;
conftest pins the backend to asyncio so the asyncio.sleep call worked
today, but the inconsistency would surface the moment that pin moves.
- 🟡 Replace the sentinel's zero dense vector with a single non-zero
element (`[1e-9] + [0.0] * (dimension - 1)`). Cosine distance is
mathematically undefined for the zero vector and Qdrant Cloud strict
mode rejects zero-vector upserts. The exact value doesn't matter
(sentinel never participates in a search — no user_id/doc_id/doc_type
payload) but the upsert itself must be valid.
- 🟡 Avoid the duplicate `get_collection` round-trip on every restart.
`_ensure_payload_indexes` now accepts an optional
`existing_schema: dict | None` parameter; when None it fetches
collection_info itself (and the get_collection-failure swallow still
applies), but `get_qdrant_client` already fetches collection_info
for dimension validation in the existing-collection branch — pass
`collection_info.payload_schema or {}` through to skip the second
call. The new-collection branch passes `existing_schema={}`
explicitly since a freshly created collection has no payload schema.
The 🟡 deck_card iteration-fallback finding doesn't apply: the
`isdigit()` guard at context.py:612 returns early before either the
fast-path or the iteration fallback runs, so non-numeric doc_ids
cannot reach the inner `c.id == int(doc_id)` comparison.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
